Data:10 147/HOMFLYPT Polynomial

Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "https://wikimedia.org/api/rest_v1/":): {\displaystyle -z^4 a^{-2} -z^4+a^2 z^2-z^2 a^{-2} +z^2 a^{-4} -2 z^2+a^2+ a^{-2} -1}